NAME

       zstd, unzstd, zstdcat - Compress or decompress .zst files

SYNOPSIS

       zstd [OPTIONS] [-|INPUT-FILE] <OUTPUT-FILE>

       unzstd is equivalent to zstd -d
       zstdcat is equivalent to zstd -dc

DESCRIPTION

       zstd is a fast lossless compression algorithm.  It is based on the LZ77 family, with FSE &
       huff0 entropy stage.  zstd offers compression speed > 200 MB/s per core.  It also features
       a fast decoder, with speed > 500 MB/s per core.

       zstd command line is generally similar to gzip, but features the following differences :
        - Original files are preserved
        - By default, zstd file1 file2 means : compress file1 into file2.
            Use -m command if you want : compress file1 into file1.zstd and file2 into file2.zst
        -  By  default, when compressing files, zstd displays advancement notification and result
       summary.
            Use -q to turn them off

       zstd supports the following options :

OPTIONS

       -#
               # compression level [1-19](default:1)

       -d
               decompression

       -f
               overwrite output without prompting

       -m, --multiple
               multiple files mode
               In  this  mode,  multiple  files  on  the  command  line  means   compression   or
              decompression of each named file
               Notifications are also turned off by default

       -D
               Use next file as dictionary content for compress / decompression

       -h/-H, --help
               display help/long help and exit

       -V, --version
               display Version number and exit

       -v, --verbose
               verbose mode

       -q, --quiet
               suppress warnings and notifications; specify twice to suppress errors too

       -c
               force write to standard output, even if it is the console

       -z
               force compression

       -b#
               benchmark file(s) using compression level #

       -i#
               iteration loops [1-9](default : 3), benchmark mode only

BUGS

       Report bugs at:- https://github.com/facebook/zstd/issues

AUTHOR

       Yann Collet